Intermittent driving mechanism



April 23,1935. O STRAUSS 1,998,855

INTERMITTENT DRIVING MECHANI SM Fi led May 5, 1954 18 a J J g0 ,11 79 2 23 28 I7 75 Z! I6 3 5 I g 25 76 V -23 25 g :27 26 3140014 601 T eodore 0. Strauss,

Patented Apr. 23, 1 9325 PATENT OFFICE INTERMITTENT nmvmo MECHANISM Theodore O. Strauss, New York, N. Y., assignor to Casteel Research Laboratories, Inc., New York, N. Y., a corporation of New York Application May 5, 1934, Serial No. 724,177 2 Claims. (01. 14-436) This invention relates to intermittentdrive mechanisms for use where continuous operation may be converted into step-by-step movement and the object of the invention is to produce a 5 cam operation where the wear is reduced to a p the cam gearing.

Fig.4 is a face view of the cam. While the improved device may be used in many varieties of light machinery it is shown in the drawing as adapted to provide for the intermittent movement of a film in a moving picture projector and in which case the pulley 5 is shown that is carried by the shaft that affords movement for the sprocket roller 6 and the intermittent roller 1. These two rollers are carried on shafts 8 and 9 respectively.

.Within the box III of the projector is located a cast metal housing II with journal bearings at each end and a tap l2 for the introduction of a lubricant.

Journalled in the bearings l3 and I4 is a shaft that is divided into two sections l5 and I6, the former having the pulley 5 at its outer end and a worm II that drives the gear wheel l8 on the shaft 8 and which gives continuous rotation to the pulleyfi. The inner endof section 15 is reduced to fltinto a socket l9 at the inner'end' of section IS, the hollowed shaft section being slotted at to receive a cross pin22 carriedby the reduced end of the section I5; Interposed between the twoshaft sections is a spring 2| to force the sections against their journals,but they are insured unity of rotation by the pin 22.

' Near the outer end of section It is a cam consisting of the circular disc 23 with a flange 24 around its edge. At one point around the flange it is broken and one edge is turned inward towards the centre of the disc as at 25 so that when the flange at 26 leaves the interval betweentwo of the teeth of the pinion 2'! on shaft 9 the end 25 of the flange will enter the next interval and the cam' consisting of a disc and interrupted flange concentric portion of the flange will advance the pinion 21' one tooth.

While the cam is shown outside of the gear wheel in Fig. 2, it will be seen in Fig. 3 that the facing of the cam 23 may be reversed to place the cam on the right of the gear wheel but thecams in each instance are identical and as shown in Fig. 4 or may be reversed.

While the roller 6 is rotating continually the rotation of the roller 1 is only one tenth as fast.

When in use the interior of the housing I I may be filled .with a lubricant and flanges 28 and 29 on the shaft sections and adjacent to the bearingswill tend to prevent leakage and prevent undue friction of the parts.

It is obvious that the parts may be otherwise arranged or modified withoutdeparting from the essential features above described or from the scope of the appended claims.

What I claim as new is: I

1. In intermittent driving mechanism, the

combination of a lubricant containing housing having an inlet, bearings at each end of the housing, a shaft section having a pulleyat itsouter end, a driving screw at said pulley end of said shaft section, a second shaft section having a cam at its outer end, a gear wheel operated intermittently by said cam, a reduced end to the first mentioned shaft section and loosely fitting into a socket in the inner end of the second shaft section, a pin causing thetwo sections to rotate together, and a spring encircling the reduced end of the first shaft section and bearing against the adjacent end of the second section. 2. In intermittent driving mechanism, the combination of a lubricant containing housing having a separate chamber at one end and an inlet for a lubricant, bearings at each end of the housing, a shaft section journalled in one of the bearings and having a sealing flange thereat, a second shaft section having asimilar flange at its bearing, a reduced end on the first shaft section and adapted to fit, into a socket in the adjacent end of the second section, a pin passing through the two sections to cause them to rotate together but permitting them to separate longitudinally, a spring around the reduced end of the first section and exerting a pressure between the two sections, a

in the end chamber and at the end of the second named shaft section, and driving means at the outer end of the first mentioned shaft section.

THEODORE O. STRAUSS. 

